Subcellular Accumulation of Different Concentrations of Cadmium, Nickel, and Copper in Indian Mustard and Application of a Sigmoidal Model

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	Subcellular Accumulation of Different Concentrations of Cadmium, Nickel, and Copper in Indian Mustard and Application of a Sigmoidal Model
	Wang, Yuanpeng ; Huang, Jing ; Gao, Yanzheng ; Wang YP(王远鹏)
刊名	http://dx.doi.org/10.2134/jeq2012.0362
	2013
关键词	HYPERACCUMULATOR THLASPI-CAERULESCENS CELLULAR COMPARTMENTATION BRASSICA-JUNCEA ZINC UPTAKE LOCALIZATION TOXICITY PLANTS SPECIATION TOLERANCE LEAVES
英文摘要	National Natural Science Foundation of China [41171193, 21077056, 41071212, 41071302]; Program for New Century Excellent Talents in University [NCET-12-0326]; Natural Science Foundation of Jiangsu Province [BE2011780]; Fundamental Research Funds for the Central Universities of China [KYZ201109]; Fok Ying Tung Education Foundation [122045]; Certain plant species can tolerate and even detoxify metallic elements. This detoxification ability has been shown to depend on how plants distribute the metallic elements in their tissues. In turn, this distribution may have an important impact on phytoremediation. Here, we investigated the effects of different single-metal concentrations (10, 50, 100, and 300 mu mol L-1) of cadmium (Cd), nickel (Ni), and copper (Cu) on their subcellular distribution in Brassica juncea L. var. megarrhiza (Indian mustard). At the applied concentration of 300 mu mol L-1, 98% of the Cu and 79% of Cd were retained in the roots, while Ni was distributed between leaves (32%), stems (29%), and roots (39%). The cell wall and soluble fractions were the dominant storage compartments for Cd and Cu in the stems and leaves, whereas the soluble fraction was the dominant storage compartment for Ni in stems and leaves. Scanning electron microscopy (SEM) X-ray micrographs showed a breakdown of epidermal, palisade, and spongy parenchyma cells following the 300 mu mol L-1 Cd, Ni, and Cu treatment. A sigmoidal model is a powerful tool to describe the subcellular accumulation and tissue concentrations of Cd, Ni, and Cu following exposure to various concentrations of metals. The coefficients of determination (R-2) values for the description of the accumulation were high, although the membrane subcellular fraction did not fit the equation. Both the maximum accumulation capacity y(max) and the critical concentrations of metals x(critical) were well described by the model. The results indicate that the use of a sigmoidal model is a promising method that could improve the understanding of metal accumulation at the subcellular level in Indian mustard.
语种	英语
出版者	AMER SOC AGRONOMY
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/88995]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Wang, Yuanpeng,Huang, Jing,Gao, Yanzheng,et al. Subcellular Accumulation of Different Concentrations of Cadmium, Nickel, and Copper in Indian Mustard and Application of a Sigmoidal Model[J]. http://dx.doi.org/10.2134/jeq2012.0362,2013.
APA	Wang, Yuanpeng,Huang, Jing,Gao, Yanzheng,&王远鹏.(2013).Subcellular Accumulation of Different Concentrations of Cadmium, Nickel, and Copper in Indian Mustard and Application of a Sigmoidal Model.http://dx.doi.org/10.2134/jeq2012.0362.
MLA	Wang, Yuanpeng,et al."Subcellular Accumulation of Different Concentrations of Cadmium, Nickel, and Copper in Indian Mustard and Application of a Sigmoidal Model".http://dx.doi.org/10.2134/jeq2012.0362 (2013).